package com.wugui.datatx.core.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * file tool
 *
 * @author xuxueli 2017-12-29 17:56:48
 */
public class FileUtil {
	private static Logger logger = LoggerFactory.getLogger(FileUtil.class);

	/**
	 * delete recursively
	 *
	 * @param root
	 * @return
	 */
	public static boolean deleteRecursively(File root) {
		if (root != null && root.exists()) {
			if (root.isDirectory()) {
				File[] children = root.listFiles();
				if (children != null) {
					for (File child : children) {
						deleteRecursively(child);
					}
				}
			}
			return root.delete();
		}
		return false;
	}

	public static void deleteFile(String fileName) {
		// file
		File file = new File(fileName);
		if (file.exists()) {
			file.delete();
		}
	}

	public static void writeFileContent(File file, byte[] data) {

		// file
		if (!file.exists()) {
			file.getParentFile().mkdirs();
		}

		// append file content
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(file);
			fos.write(data);
			fos.flush();
		} catch (Exception e) {
			logger.error(e.getMessage(), e);
		} finally {
			if (fos != null) {
				try {
					fos.close();
				} catch (IOException e) {
					logger.error(e.getMessage(), e);
				}
			}
		}

	}

	public static byte[] readFileContent(File file) {
		Long filelength = file.length();
		byte[] filecontent = new byte[filelength.intValue()];

		FileInputStream in = null;
		try {
			in = new FileInputStream(file);
			in.read(filecontent);
			in.close();
		} catch (Exception e) {
			logger.error(e.getMessage(), e);
		} finally {
			if (in != null) {
				try {
					in.close();
				} catch (IOException e) {
					logger.error(e.getMessage(), e);
				}
			}
		}
		return filecontent;
	}

	/*
	 * public static void appendFileLine(String fileName, String content) {
	 * 
	 * // file File file = new File(fileName); if (!file.exists()) { try {
	 * file.createNewFile(); } catch (IOException e) { logger.error(e.getMessage(),
	 * e); return; } }
	 * 
	 * // content if (content == null) { content = ""; } content += "\r\n";
	 * 
	 * // append file content FileOutputStream fos = null; try { fos = new
	 * FileOutputStream(file, true); fos.write(content.getBytes("utf-8"));
	 * fos.flush(); } catch (Exception e) { logger.error(e.getMessage(), e); }
	 * finally { if (fos != null) { try { fos.close(); } catch (IOException e) {
	 * logger.error(e.getMessage(), e); } } }
	 * 
	 * }
	 * 
	 * public static List<String> loadFileLines(String fileName){
	 * 
	 * List<String> result = new ArrayList<>();
	 * 
	 * // valid log file File file = new File(fileName); if (!file.exists()) {
	 * return result; }
	 * 
	 * // read file StringBuffer logContentBuffer = new StringBuffer(); int
	 * toLineNum = 0; LineNumberReader reader = null; try { //reader = new
	 * LineNumberReader(new FileReader(logFile)); reader = new LineNumberReader(new
	 * InputStreamReader(new FileInputStream(file), "utf-8")); String line = null;
	 * while ((line = reader.readLine())!=null) { if (line!=null &&
	 * line.trim().length()>0) { result.add(line); } } } catch (IOException e) {
	 * logger.error(e.getMessage(), e); } finally { if (reader != null) { try {
	 * reader.close(); } catch (IOException e) { logger.error(e.getMessage(), e); }
	 * } }
	 * 
	 * return result; }
	 */

}
